add socket_set_block

Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

oslib-posix.c

@@ -103,6 +103,13 @@ void qemu_vfree(void *ptr)
     free(ptr);
 }
 
+void socket_set_block(int fd)
+{
+    int f;
+    f = fcntl(fd, F_GETFL);
+    fcntl(fd, F_SETFL, f & ~O_NONBLOCK);
+}
+
 void socket_set_nonblock(int fd)
 {
     int f;

oslib-win32.c

@@ -73,6 +73,12 @@ void qemu_vfree(void *ptr)
     VirtualFree(ptr, 0, MEM_RELEASE);
 }
 
+void socket_set_block(int fd)
+{
+    unsigned long opt = 0;
+    ioctlsocket(fd, FIONBIO, &opt);
+}
+
 void socket_set_nonblock(int fd)
 {
     unsigned long opt = 1;

qemu_socket.h

@@ -35,6 +35,7 @@ int inet_aton(const char *cp, struct in_addr *ia);
 /* misc helpers */
 int qemu_socket(int domain, int type, int protocol);
 int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
+void socket_set_block(int fd);
 void socket_set_nonblock(int fd);
 int send_all(int fd, const void *buf, int len1);